436results about How to "Improve wear performance" patented technology

The invention discloses a radar wave stealth coating with good radar wave-absorbing performance, light mass and thermal insulation function, and a production method thereof. The coating comprises a film-forming substance, an absorbent, an external additive and a solvent. The coating is characterized in that the radar wave absorbent is hollow microspheres covered with magnetic conductive metal films. The coating absorbent has good performance, light mass and good thermal insulation. The components by weight percentage comprise the following: 16.25 to 74.40 percent of film forming substance, 25.60 to 83.80 percent of absorbent, 1 to 20 percent of additive, and 10 to 150 percent of solvent. The coating is applied to the field of radar wave absorption, for example, the coating is used for various weapons, camouflage nets and, protection suits and so on.

The present invention provides one kind of polyurethane-acrylate composite emulsion and its preparation process. The preparation process includes preparing water soluble polyurethane seed emulsion, and adding methacrylate and cross-linking agent to the seed emulsion to prepare interpenetrating polymer network polyurethane-acrylate composite emulsion. The polyurethane-acrylate composite emulsion contains solid material in 20-60 wt%, and has particle diameter of 10-100 nm. The preparation process is simple, and the prepared polyurethane-acrylate composite emulsion has high quality, especially excellent water resistance, heat resistance, chemical resistance and wear resistance, and wide application range.

A lubricant composition of an oil of lubricating viscosity and a polymeric phosphorus ester comprising the condensation product of a monomeric phosphorus acid or an ester thereof with a diol having two hydroxy groups separated by a chain of 4 to about 100 atoms exhibits good volatility, corrosion, wear, and/or seal performance in lubrication of a transmission.

The invention relates to a catalyst for directly preparing a low-carbon olefin from a microspherical synthesis gas, and is mainly used for solving the problems that the existing co-precipitation Fischer-Tropsch catalyst preparation technology comprises the following steps: firstly co-precipitating and then pulping and spray-forming, so that the slurry is substantially a non-homogenous body dispersed by adopting a physical method, the finial catalyst finished product is uneven and the hydrocarbon products on the catalyst are widely distributed. The problems are well solved by adopting the technical scheme that the preparation method comprises the following steps: firstly precipitating a part of components, then carrying out peptization on the obtained precipitates by using the salt solution of non-precipitated components to obtain chemically evenly dispersed sol, then spray-drying the sol, and then roasting at high temperature. The preparation method can be used for industrial production for a catalyst for synthesizing the low-carbon olefin from the synthesis gas. The catalyst is applicable to but not limited to such reactors as a fluidized bed and a slurry-state bed in which catalyst grains are required to be distributed according to the certain distribution rule.

The invention relates to the field of friction materials for braking of high-speed trains, in particular to a ceramic/metallic double continuous phase composite material brake pad and a preparation method thereof. The brake pad comprises the following components in percentage by weight: 15 to 40 percent of foam silicon carbide ceramics, 10 to 30 percent of friction element and 75 to 30 percent ofmetal. The method comprises the following steps of: preparing the silicon carbide foam ceramics having a three-dimensional network structure by employing a technology combining polymer pyrolysis withcontrollable infiltration reaction sintering; selecting a proper friction element and filling in mesh holes of the foam ceramics; and injecting melt copper alloy into a framework of the foam ceramicsby utilizing an extrusion casting method to obtain the ceramic/metallic double continuous phase composite material brake pad. The composite material brake pad can be paired with a 28CrMoV forged steel brake disc, has the characteristics of proper and stable friction coefficient, low wear rate, high heat resistance, high thermal or mechanical damage resistance, good process performance, low manufacturing cost, long service life and the like, completely meets the brake requirement of a high-speed train at a speed of 200 to 300km/h, and has good competitive advantage on the brake requirement of a high-speed train at the speed of 350km/h.

The invention relates to the technical field of rubber, in particular relates to a tire tread rubber composition and a preparation method. The tire tread rubber composition is characterized by taking 100 parts of natural rubber as reference, also comprising 5-10 parts of liquid butadiene rubber, 40-55 parts of carbon black, 5-15 parts of white carbon black, 2.5-3.0 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of silane coupling agent, 1-3 parts of N-(1, 3-dimethylbutyl)-N'-phenyl-p-phenylenediamine anti-aging agent, 1-2 parts of 2, 2, 4-trimethyl-1, 2-dihydroquinoline polymer anti-aging agent, 1-2 pats of protective wax, 1-1.5 parts of sulphur, 1.0-1.5 parts of vulcanization accelerator, and 0.1-0.3 parts of anti-scorching agent in part by weight. In the tire tread rubber composition, the tire wear property can be increased, the tire rolling resistance can be lowered, the tire slippery property is improved, and the comprehensive use property of the tire can be enhanced.

The invention relates to copper-based powder dispersion ceramic as well as a preparation method and application thereof, and relates to the field of ceramic materials. The copper-based powder dispersion ceramic is prepared from an anti-abrasion constituent element as one of the raw materials, wherein the anti-abrasion constituent element comprises the following components by mass percent of all the raw materials: 1-5 percent of diamond powder and 1-5 percent of titanium diboride powder. The copper-based powder dispersion ceramic is high in impact pressure resistance, high in mechanical intensity, high in friction and abrasion resistance, long in service life, high in heat dissipation property and heat recovery property, high in high-temperature and low-temperature resistance, high in acid, alkaline, oil, water and the like corrosion resistance and the like.

An anti-impact and anti-wear conveying belt features that the rubber layer covered on its surface is proportionally prepared from natural rubber, synthetic rubber, sulfur, zinc oxide, stearic acid, promoter, reinforcing agent, softening agent and anti-ageing agent.

The invention provides an environment-friendly stemming and a preparation method thereof. The environment-friendly stemming is prepared from, by mass, 15-40% of aluminum containing aggregates, 2-15% of coke, 1-5% of graphite, 10-25% of silicon carbide, 5-20% of ferro-silicon nitride, 5-20% of aluminum containing fine powder, 5-15% of clay, 2-8 parts of sericite, 2-6% of high-temperature pitch, 2-15% of an expanding agent and a binding agent accounting for the total mass of the other materials by 15-30%, wherein thermoplastic phenolic resin serves as the binding agent. The environment-friendly stemming and the preparation method thereof have advantages that toxic gases are avoided, a furnace front operation environment is improved, environmental friendliness, low raw material consumption, high hardening speed and short sintering time are realized, opening performance and slag iron erosion resistance of the anhydrous stemming are improved, resistance of the anhydrous stemming to flushing and abrasion of high-temperature molten iron is enhanced, and quality stability of the anhydrous stemming is improved.

The invention discloses a low temperature setting elastic coating wire manufacturing process, in particular relates to a coating manufacturing process which implements the low temperature setting on polyolefin elastic filament fiber. The technological process of the invention is mainly divided into four parts of elastic wire feeding, tensile covering, relaxation coiling and the last lower temperature setting of textile. In every process step, specific process conditions are selected. Especially when the low temperature setting condition is selected, such as 60 or 70 DEG C, the setting of the elastic long fiber textile can be realized. At the same time, proper traction force, traction multiple, coating twist, winding speed, etc. are matched in the coating wire manufacturing process. The invention has the advantage that wearing fabrics with high quality can be produced under the effective energy saving condition. Fabric strength, heat setting property, etc. are well guaranteed. And the operation is more convenient. The invention can be widely applied to the preparation process of various high-grade fabrics.

The invention provides a multielement silane coupling agent-modified phenolic resin base combined disc brake pad and a preparation method thereof, and relates to the technical field of automobile parts.The brake pad is prepared from, by mass, 4-7% of organosilicone-modified phenolic resin, 2-4% of polyacrylonitrile carbon fibers, 2-4% of aramid pulp, 10-34% of potassium titanate lamellae, 5-18% of steel fibers, 2-6% of glass fibers, 3-10% of natural flake graphite, 3-10% of granulated coke, 0.5-1.5% of silicon dioxide, 25-40% of barite and 2.5-10% of a multielement silane coupling agent.The disc brake pad has the advantages of being good in interfacial compatibility, stable in friction coefficient and product quality, excellent in wear resistance and anti-noise performance and the like; besides, a material modification process and a mixing process are integrated in the preparation method of the disc brake pad, so that production efficiency is high, modification cost is lowered, and the process is simple.

The invention discloses an inflation tire, which can be used to maintain the sideslipping performance, the performance on wet road surfaces of the vehicle, and to improve the heal-and-toe wear resistance performance of the vehicle. The inflation tire (1) is provided with a plurality of grooves(3) of a pair of tire shoulder main grooves(4). A land part width (Ls) of a tire shoulder land part(6) is 10 to 15% of a tire surface grounding width (TW). The tire shoulder land part (6) is provided with a first tire shoulder horizontal groove (15), which extends from the part close to the tire surface grounding end (Te),and is inclined at an angle of 10 to 35 degrees relative to the tire shaft; a second tire shoulder horizontal groove (16), which is inclined from the part between the first tire shoulder horizontal grooves (15, 15) at an angle of 10 to 35 degrees towards the axial direction of the tire, and can form a terminal on the tire shaft more close to the inner side than the first tire shoulder horizontal groove(15); a third tire shoulder horizontal groove (17), which is inclined from the outer side of the tire surface grounding end (Te) of the tire shaft towards the inner side of the tire shaft, and can form a terminal close to the tire surface grounding end(Te).

The invention discloses an electrolyte and technology for preparing a ceramic coating formed by plasma micro-arc oxidation on a zirconium alloy surface. The technology comprises the following steps: (1) preparing the electrolyte; (2) treating the zirconium alloy surface; and (3) carrying out the micro-arc oxidation technology. The invention has the advantages that the electrolyte is water solution of various compounds, can provide a micro-arc discharge center, and has proper acidity and alkalinity, good ionic conductivity and chemical stability; the solutes of the electrolyte have wide source and low price; the treatment of the zirconium alloy surface has low requirement, and the micro-arc oxidation technology is simple and convenient in control; the ceramic coating formed by micro-arc oxidization has larger thickness, and by adjusting the formula of the electrolyte and the conditions of the micro-arc oxidation technology, the thickness of the ceramic coating can be controlled in a range of 30-80 micrometers; and the ceramic coating has good wear resistance and corrosion resistance.

The invention relates to a rubber composition. The rubber composition is prepared from the ingredients in parts by mass: 80-120 parts of crude rubber, 1-5 parts of peroxide initiator, 2-15 parts of bridging agent, 0.1-1 part of free-radical absorption and release regulator and reinforcing and anti-aging agents, wherein the crude rubber comprises any one to any three of polybutadiene rubber, natural rubber and styrene-butadiene rubber and accounts for 70 percent or more of mass of the crude rubber. According to the rubber composition and the application thereof, a formula of the rubber composition and adjuvants for product cross-linking and the like is provided, so that the requirements of a technical scheme for representatives, i.e., tires, shoe materials and wear resisting plates on good properties and good industrial adaptability effect can be met; cost and environmentally-friendliness can be taken into account simultaneously.

The invention discloses an infrared radiation coating suitable for a metal matrix and a preparation method, a mass ratio of a component A to a component B is 80-120%, wherein the component A comprises the following raw materials by mass percentage: 30-90% of transitional metal oxides infrared radiation powder, 2-20% of inorganic bind additive, 0-30% of silicon carbide, 0-30% of corundum, 0-20% of zirconia, 0-20% of Ni powder, 0-20% of Zn powder, 0-20% of Al powder, 0-1% of carbon powder and 0-10% of sodium fluosilicate; the component B comprises the following raw materials by mass percentage: 60-95% of sodium silicate, 0-35% of water, 0-3% of dispersant, 0-1% of thickener, 0-1% of defoamer and 0-1% of leveling agent. After drying and solidifying the coating, the surface of the formed coating is compact, the infrared radiation coating has excellent infrared radiation performance and high temperature stability, and can firmly bonded with the metal matrix.

The invention discloses a method for preparing a wear-resistant nano calcium oxide-based carbon dioxide (CO2) reaction adsorbent. The method comprises the following steps of: dispersing calcium carbonate (CaCO3) particles in water; adding aluminasol; stirring until pulp is well distributed; spraying and pelleting to obtain microspherical particles with particle diameter of 20 to 250 mu m; and calcining the microspheric particles to obtain the spherical wear-resistant nano calcium oxide-based CO2 reaction adsorbent. The wear strength of the wear-resistant nano calcium oxide-based CO2 reaction adsorbent can be improved by the method; and the method can be widely applied to industrial processes of removing the CO2 from industrial smoke, removing the CO2 by a reaction, a new adsorption strengthening methane steam reforming hydrogen production process and the like.

The invention discloses a preparation method of a carbon fiber and silicon dioxide nanosphere synergically filled ultra-high molecular weight polyethylene wear-resistant material and relates to the field of nanotribology, in particular dispersion of a nano material in high molecular resin and tribological properties thereof. The preparation method comprises the following steps: firstly, modifyingthe carbon fibers with nitric acid to obtain nitric acid modified carbon fibers; loading silicon dioxide nanospheres on the surfaces of nitric acid modified carbon fibers by means of a sol-gel processto obtain a composite material of silicon dioxide nanospheres and carbon fibers, and performing surface coupling treatment to obtain coupled composite packing; and finally, mixing the coupled composite packing with ultra-high molecular weight polyethylene, and performing hot pressing and sulfidizing to obtain the carbon fiber and silicon dioxide nanosphere synergically filled ultra-high molecularweight polyethylene wear-resistant material. The composite material has relatively good mechanical property, frictional wear-resistant property, mortar wear property and machine shaping property.